To view a STEP file without a CAD program, drop it below. It is turned into a mesh on our servers and shown here; to get a file you can use elsewhere, convert it.
60 free views a day with no account. No card, no install.
Drop a STEP file.step / .stp · up to 200 MB · 60 free views a day
FormatWhat you are holding
STEP file (ISO 10303) (.step / .stp)
STEP (ISO 10303) is the closest thing engineering has to a universal solid format. It stores exact B-rep geometry — a hole is a cylindrical face, not a ring of facets. Fusion 360, Inventor, Onshape, SOLIDWORKS, Creo, NX, CATIA and FreeCAD all read it; .step and .stp are the same format. AP242 supersedes AP203 and AP214.
Yes. A browser cannot draw exact CAD geometry, so the STEP file is sent to our own servers, turned into a mesh and sent back. Without an account it is deleted within 24 hours; it is never shared and never used to train AI.
Is it free?
Yes. Without an account you can view 60 files a day, and viewing does not use your 5 free conversions. Converting the file to a format you can keep is a conversion, charged as one.
Can I measure the part?
The viewer shows its overall size along each axis, in the units stored in the file. For distances between features, convert it and open it in your CAD system.
What does the viewer not show?
Colours, textures and materials are not drawn, and every surface is shown as triangles. The STEP file itself keeps its exact surfaces; convert it to STEP to carry those into CAD.